Machine for coating webs with adhesives



A. M. BECKER.

MACHINE FOR COATING WEBS WITH ADHESIVES.

APPLICATION FILED MAY 6,192!- Patented Nov. M, 192% 2 SHEETS-SHEE'I 1.

*N w IN Q A. M. BECKER:

MACHINE FOR COATING WEBS WITH ADHESIVES.

APPLICATION FILED -MAY 6,1921.

Patented Nov. 141, 1922.

2 SHEETS-SHEET 2'.

Patented Nee. tie, teat.

AUGUST M. BECKER, OF NEW YORK, N. Y., ASSIGNOR F new entrant oration.

ONE-HALF T0 MARTIN STEINTHAL, OF NEW YORK, N. Y.

MACHINE FOR COATING WEBS WITH ADHESIVJES.

Application filed May 6,

To all whom it may concern:

Be it known that I, AUeUsT M. BECKER, a citizen of the United States, residing in New York city, county'of New York, and State of New York, have invented certain new and usefullmprovements in Machines for Coating Webs with Adhesives, of which the following is a specification.

My invention relates to a machine for s readin adhesive substance over the surface of a web or sheet of material to give the same an adhesive coat, for any of the various purposes for which the same may be used,

such for example, as coating sheets of fabric or paper with glue so that the sheet may be applied and permanently attached to -the surface of an article. It is a serious draw-. back in machines of this class to have the same so constructed that ina short period of use the glueaccumulates at certain points of the machine and so clogs it as to render it inoperative for the time machine can be taken down and cleaned;

@ne of the objects of my present invention is to overcome these drawbacks and to provide means for effecting an even and uniform distribution of the adhesive substance on the coated surface of the web; another objectof the invention is to provide a guide for the coated web having practically the minimum surface of the moving web, thereby avoiding the use of an extended surface which would become smeared with the adhesive'substance in the course 'of operation of the machine; and still another object of'the invention is to provide adjustable scraping means for.

regulating the amount of adhesive contained in the given coat, making it heavy or light as desired, and to have such scraping means automatically drained so that the removed surplus may be returned to the reservoir of adhesive. view, my invention consists in the various novel and peculiar arrangements and con-,

structions of the several different parts of the apparatus, all as more fully hereinafter set forth and then pointed out in the claims.

In the accompanying drawings I have illustrated a type of my invention, and in the same,

Fig. 1, is a top plan view of an adhesivecoating-machine made in accordance with my invention.

being and until the of contact with the back.

*spectively, which With these and other objects in lower edge for receiving 1921. Serial No. 467,335.

Fig. 2, is a view of the plane of the'section being longitudinal and vertical through the center of the machine.

Fig. 3, is an enlarged crosssectional view of the machine and with a web shown as passing through the same and being coated upon its under side with adhesive substance.

Fig. 4, is an end elevation of the machine, on a reduced scale. Fig. 5, shows another adjustment of the scraper.

eferring to the drawings, in which like numerals of reference designate like parts throughout, 1 indicates a tank or vessel for the adhesive substance 2, which may be heated by a water-jacket 3, containing water a, and beneath which is a gasburner 5, for

furnishing the necessary heat for the water. Within the tank 1, is mounted a rotary drum or cylinder 6, for receiving and distributing or applying the adhesive substance 2, contained in the reservoir or tank, and into which the drum is arranged to dip so that its under part remains constantly submerged in the adhesive and thereby serves to draw it up on the surface of the revolving drum in a thin film or layer and apply the adhesive to the web 7, as the latter is moved in contact with the periphery of the drum. The drum is provided with trunnions 8 and 9, at the respective ends of the same, and they turn in suitable bearings 10 and 11, reare arranged in the end flanges l2 and 13, respectively, of the tank. A collar 14, is secured to the trunnion 8, and the other trunnion 9, carries a detachable crank-handle 15, by means of which the drum is turned by hand.

In the tank is placed a wire gauze trayshaped strainer 16, which is large enough to receive the lower part of the rotary drum 6, and serves to strain the adhesive substance 2, contained in the tank before it can be taken up by the drum.

A scraper 17, is arranged at one side of the drum and is in the form of an angle-iron with the angle pointing upwardly so that both members or wings thereof are inclined downwardly in order to quickly drain back into the tank, the surplus or excess of ad hesive scraped from the rotating drum. The outer wing of the angle-iron 17, is proadjusting slots 18 and 19, in its vided with set screws 20 and the same in section,

21, respectively, which are carried by blocks 22 and 23, respectively, mounted on a bar 24, which in turn is mounted in the end flanges 12 and 13, of the. tank and may be turned on its axis for the purpose of adjusting the scraper 17, the ends of the supporting bar 24, being provided respectively with thumb-screws 25 and 26, for holding the bar in adjusted position. The block 22, is provided with a set screw 27, and the block 23, with a set screw 28, for the purpose of permitting longitudinal adjustment of the respective blocks on the supporting bar 24, if so desired, and to hold the blocks in operative positions for carrying the scraper.

The axis of the supporting-bar 24, lies within the angle of. the scraper and somewhat near the outer wing of the same and at about the level of the lower edge of said wing, as indicated more clearly in Fig. 3, so that when the thumb-screws and 26, at the ends of the supporting-bar are loosened, the angle-iron shaped scraper may rest with its inner edge against the periphery of the drum and if desired may be kept in such operative contact by gravity, the weight of the scraper being mainly against the side of the drum, likewise the added weight of the blocks 22 and 23, may be made to increase this effect if preferred. By virtue of the peculiar shape of the scraper and the manner in which it is mounted and related to the periphery of the drum, 1 provide a most efficient surplus remover and scraper, which houses or screens the adhesive which is scraped from the rotating drum and thereby prevents it from creeping into undesirable places and near where the web is fed and causing an objectionable mess. The inclination of the inner wing of the scraper will cause the surplus adhesive to be thrown back onto the drum below thescraping pointand to be mixed with fresh adhesive so that it will not therefore thicken and gum the parts, and any adhesive that may be carried back from the inner wing onto the underside of the outer wing, will be drained by the outer wing down into the tank. As the adjustment of the scraper relatively to the drum is an angular one made by angular motion about the axis of rota? tion of the supporting-shaft 24, the scraping edge of the scraper is always in parallelism with the periphery of the drum and the adjustment of the scraping edge relatively to the periphery is a delicate one and can be made minute as desired. By employing the angle-iron .shape, the scraper is also strengthened and made stiffer than otherwise so that it maintains a straight edge.

The respective ends of thedrum 6, are scraped by means of blades 29 and 30, re spectively, which are held ,by detachable clamps 31 and 32, respectively, mounted on the shoulders 33 and 34, respectively, at the ends of the tank. These end scrapers serve to keep the adhesive substance from being carried up and around by the rotating drum and thereby avoid the unnecessary accumulation of the adhesive at the drum ends and possible interference with the consistency of the film on the periphery of the drum with which it might accidentally be mixed. In this way I keep the drum entirely free from surplus adhesive and accidental accumulation thereof at the ends of the same.

The web or sheet of material 7, upon the underside of which the adhesive is to be spread or smeared by "the rotary drum, is

fed to the drum by a pair of feed-rollers 35 and 36, which are mounted to turn in the end pieces 37 and 38, which are connected together by means of the longitudinal rods 39 and 40, and together constitute a removable frame for the feed-rollers and other adjuncts. This removable frame is provided with inclined slots 41 and 42, in the respective end pieces 37 and 38, for receiving lugs 43 and 44, respectively, which are located upon the inner face of the end flanges of the tank 1, near one end thereof, and the screws 45 and 46, respectively, which pass through threaded perforations in the end flanges, have their ends in engagement with sockets 47 and 48, in the end pieces of the frame, and thus the frame is removably held in operative position.

The upper feed-roller has its bearings in the end pieces enlarged-vertically as at 87, (see F ig. 3) so as to give it slight vertical play, and at one -end-it is provided with a gear wheel 49, which meshes with a gear 50, fixed to the lower feed-roller 36, and the latter gear meshes with an idle pinion 51, which gears with a large driving toothedwheel 52, which is fixed to the trunnion S), of the rotar drum, and serves to thus drive the feed-r01 ers in opposite directions so as to feed forward to the drum, the web 7. when the same is introduced between the rollers.

A table or rest 53, is detachably mounted across the end members 37 and 38, of the frame by means of studs 54 and 55 on said members, respectively, and the holes 56 and 57, in the respecfive ends of the table. A guard 0r gage device 58, is slidably mount ed on the outer edge of the tabe 53, and may be shifted sidewise thereon to accommodate differentwidths of web and engage the edge of the same as it is fed forward to the feedrollers. The table being removable, the operator may have ready access to the subjecent scraper and the tank and this is an advantage in this class of machines. and it also enables the user to quickly remove and clean the table when necessary.

The bite or space between the feed-rollers wearer 65 and 36, is disposed slightly below the level of the high part of the drum 6,. so that the web 7, will make contact with'considerable circumferential area of the drum, as indicated in Fig. 3, instead of meeting it on merely a tangential line, so that the transfer of the adhesive from the drum surface to the web surface is better insured and an even and uniform coating of the web is made more certain. The vertical play of the upper feed-roller 35, allows for varying thickness of the web or sheet used on the machine and does so automatically.

When the forward edge of the web meets the drum, it adheres thereto and in this condition the web is carried some distance by the rotation of the drum and until such edge collides with the stripper -or' deflector 59, which members 37 is held against the drum by its weight and by action of a spring 60. The stripper is cut-away at its forward edge, as at 61, and is formed with two suitably spaced wings 62, having their ends pointed at 63, for easy insertion under the adhering for- Ward edge of the web and the gradual raising of the same over the wavy edges 64, of the wings, the raised points of which give but small contact between the wings and the coated surface of. the wings. The contacting upper edges of the wings 62, are beveled to a fine edge and the space between the wings is such that the operator may insert his finger therebetween and grasp the forward end of the coated web and help to draw it across the drum, at the same time the handle 15, is turned and the drum rotated. In this same operation, the web is raised upwardly so that its tin-coated back surface slides under the guide-fingers 66, arranged in a set longitudinally of the drum and in proximity thereto. The lower end of the stripper 59, is provided with two ears 67, having upwardly extending notches- 68, which fit over the rod 40, of the removable frame structure, and the spring 60, has one limb extending through a perforation in the rod 40, while its other limb has a small bend therein at 70, which snaps into a notch 69, in the body of the deflector. The notches 68, in the ears 67, are recessed at 71, so that the rod 40, moves therein under pressure of the spring 60, and assists in retaining the deflector in place.

The guide-fingers 66, are small plates having a central eye 72, for receiving loosely the squared-bar 3, on which the fingers may be strung and slid sidewise in adjusting them for difierent widths of web. Spacing members 74, are placed on the bar 7 3, between the guide-fingers and may belikewise slid sidewise thereon, and are three sided devices which are held on the bar by friction. The bar 73, is mounted in the end and 38, of the detachable frame,

web passing over the so as to be vertically adjustable therein, in order to vary the space between the guide-fingers and the drum, the adjustment being eifected by vertically elongated slot-s 75, 76, in the end members and the nuts 77, 78, on the outer ends of the bar 73.

The edges of the guide-fingers which come in contact with the back of the web, are curved or arc-shaped and are beveled at 79, so as to present the minimum of contact surface between the same and the web, so that there is little chance of much of the adhesive being accidentally retained by the guide-fin gers, should the same actually reach the fingers in the operation of the machine. The apparatus is thus kept free from becoming fouled and messing the un-coated back of the web with the adhesive used in the machine.

' The scrapers at the respective ends of the drum serve to keep the upper part of such ends free from the adhesive substance that is necessarily carried up by the rotation of the drum, and this not only avoids an accumulation of adhesive at such places and the accidental escape therefrom to the periphery of the drum, but also keeps the bearings at the end of the drum practically free from clogging by the presence of the adhesive.

By virtue of having the scraper of the drum-periphery inclined downwardly and giving it the capacity of angular adjustment about the axis on which it is mounted and also adjustment transversely of such axis, its proximity to the drum as well as its angle of inclination thereto may be readily changed and both adjustments made minute. It is also an important advantage to have the adjustable scraper concave upon its underside, as hereinbefore described, and to this end the scraper may be varied in cross-sectional shape as desired. The adjustment of the scraper may be varied as desired, so that its wing which engages the drum may so engage it high up, for example as shown in Fig. 3, which may be done when the adhesive is not heavy or thick and-then the straight face of the edge of the wing may make more full contact with the drum, or the scraper may be set so that it will engage the drum lower down, as shown in Fig. 5, which may be done when the adhesive is thick and the upper corner of the engaging edge of the scraper may thus be made to engage the periphery of the drum with more of a cut ting scrape than in the other'case. The thickness or depth of the coat of adhesive may .be regulated by adjustment of the scraper engaging the drum periphery, so as to vary proximity of the two and to vary the angle of the scraping wing or blade with the periphery of the drum, and the scraper may be made to press against the drum with varying degrees of pressure, or may be so set as to be just out of contact therewith,

desired. The scraper may be so set that its straight or flat edge may be tangent to the periphery of the drum, or by tipping the scraper upwardly its loweredge may make contact with the drum, while tipping it downwardly will bring the upper edge of the scraper into contact with the drum, and these adjustments may be adopted to suit the conditions at hand, the character of the adhesivesubstance, whether thin or heavy, determining in part the adjustment to be ado ted.

' y improved machine may be used for spreading or coating with adhesive or glue, the surface of a web or sheet of leather, fabric, paper or veneer of any kind, so that such webor sheet can be applied to the desired surface which it is to cover, and adhere to the same.

I wish to be understood as not limiting my invention to the particular construction of the various parts thereof, as it is evident that many modifications may be made in the same, without, however, departing from the spirit of the invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In a machine of the classdescribed, the combination of a rotary adhesive-distributing drum having means for supplying its periphery with adhesive sub-stance, means for moving a web of material to be coated with the adhesive in contact with said drum, to coat the said web, and a longitudinally arranged set of guide-fingers disposed in spaced apart relation to said drum and engaging the back or un-coated surface of the said web after it has moved away from said drum, said guide-fingers being disposed upon the opposite side of the vertical plane containing the axis of said drum to that of said web-moving means.

2. In a machine of the class described, the combination of a rotary adhesive distributing drum having means for supplying its periphery with adhesive substance, means for moving a web of material to be coated with adhesive across the said drum to coat the said web, and a set of guide-fingers disposed in spaced apart relation to said drum and engaging the back of the web after it hasmoved away from said drum the said guide-fingers being bowed or curved inward- 1y towards the periphery of said drum, said guide-fingers being arranged upon the oppo site side of the vertical plane containing the axis of said drum to that of said web-moving means.

3. In a machine of the class described, the

combination of a rotary adhesive-distributing drum having means for supplying its periphery with adhesive substance, means,

meme? adhesive material in contact with the said drum to coat the said web, guiding means for engaging the back or un-coated surface of the said web after it has moved away from said drum, and a stripper engaging the periphery of said drum and actlng to lift the adhesive-coatedweb therefrom 'as g the drum is rotated.

5. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying its pe riphery with adhesive substance, means for moving a web of material to be coated in contact with said drum, and a stripper formed in one piece and engaging the. periphery of said drum and acting to engage the edge of the adhesive-coated web and lift it from the drum, the engaging part of said stripper being provided with a series of engaging points making contact with the said coated surface of the web and having a finger-receiving space between said points for permitting the operator to seize the web.

6. In a machine of the class described, the combination of a rotary adhesive-distributing drum and. means for. supplying the periphery thereof with adhesive substance, means for moving a web of material to be coated in contact with said drum, and a stripper device engaging the periphery of said drum and acting to lift the adhesivecoated web therefrom, said stripper comprising a plate having web-engaging wings over which said web moves and between which wings the finger of the operator may be inserted for seizing the Web.

7 In a machine of the class described,the combination of a rotary adhesive-distributing drum and means for supplying its periphery with adhesive substance, means for moving a web of material to be coated with adhesive in contact with said drum, and a set of guide-fingers arranged in proximity to said drum and spaced apart, the said guidefingers being plate like devices with sharp beveled engaging edges for minimizing the contacting surface with said web as the same moves over the fingers.

8. In a machine of the class described, means for spreading adhesive substance over the surface of a web to coatit, means for moving theweb as it is coated, a set of guidefingers over which the back of the web moves, sa idguide-fingers being provided lel with the axis of rotation of feed-rollers with a support on which they may be laterally moved, and movable spacing members between said guide-fingers.

,9. In a machine of the class described, thecombination of a rotary adhesive-distributing .drum and means for supplying its pea pair of web-feeding rollers having their axes paralsaid drum and between which rollers the web is'fed to the drum, the space or'bite between said rollers being at a slightly lower level than the high part of the drum, and the said being arranged with their axes contained in a plane oblique to the vertical plane containing the axis of rotation of the drum and with the upper roller of said pair i the combination of tributing ,to that of said drum and constructed tributing drum and lying nearer the said vertical plane than the lower one, whereby the web is directed downwardly towards the periphery of said drum to insure firm contact therewith.

10. In a machine of the a rotary adhesive-distributing drum and means for supplying its periphery with adhesive substance, a pair of Web-feeding rollers having their axes parallel with the axis of rotation of said drum and between which rollers the web is fed to the drum, the bite between said rollers being on a level slightly below the high part of the drum, and a series of guide members for said web arranged 'invspaced apart relation to the drum with their contacting parts slightly above the high part of said drumfor engaging the back of the coated'web as the same is moved away from said drum, said guide-members being arranged upon the opposite side of the vertical plane containing the axis of said drum Web-feeding rollers.

v11. In a machine of the class described, the combination of a rotary adhesive-disdrum and means for supplying its periphery with adhesive substance, a scraper for cooperating with the periphery of said and arranged so as adjusting movement with that of the said to have an angular about an axisparailel drum, and having a longitudinally extendmg recess disposed to ing edge. v

12. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying its periphery with adhesives'ubstance, a scraper having its under side concave and co-operating with the periphery of said drum and having its inner and outer edges or parts downwardly inclined in opposite directions, said scraper being adjustable angularly on the rear of its scrap- 1 an axis parallel with said drum.

13. In a machine of the class described, thev combination of a rotary adhesive-dismeans for supplying its periphery with adhesive substance,adoubleclass described, i

, having one of its wing scraper having its wings at an angle to each other and both inclined downwardly in opposite directions and cooperating with said drum, the said drum-engaging wing being of a substantial width to avoid clogging from accumulated adhesive substance.

14. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying its periphery with adhesive substance, a scraper co-operating with the periphery of said drum and comprising an angle-member adj ustably mounted with relation to said drum with the apex of the angle-member disposed upwardly, said angle-member bein adjustable angularly about an axis para lel with said drum and also transversely adjustable .drum, a scraper cooperating with said drum and adjustably mounted in relation to the rum on an axis parallel with that of the drum, the said scraper being convex on its under side and transversely adjustable relatlvely to said axis, and also angularly adjustable on said axis.

17. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for sup-plying its periphery with adhesive substance, a trans versely arched or bent scraper mounted on an axis parallel with that of the drum and angularly adjustable thereon, adjusting slots and set-screws intermediate said scraper and its mounting for adjusting the scraper transversely of its axis.

18. In a machine of the class described, the i combination of a rotary adhesive-distributing drum and means for supplying adhesive substance thereto, a two-winged scraper with the wings lying out of a common plane and wings mounted on an axis parallel with that of said drum and angularly adjustable with respect to its said axis and at the same time transversely adjustable with respect to its said axis, the other said wing being free to engage the periphery of said drum.

19. In a machine of the class described,

the combination of a rotary adhesive-distributing drum and means for supplying adhesive substance to the periphery of said drum, means for feeding a web to said drum,

means for rotating the drum, and a stripper for lifting said web from the drum when coated, said stripper being provided with spaced wings having indented web-engaging edges thereof providing raised points for the web to pass over.

20. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying its periphery with adhesive substance, means for rotating the drum, means for feeding a web to the periphery of said drum, and a stripper resting against the periphery of said drum and provided with a spring for keeping it in engagement with the drum, said stripper being movably mounted to permit of its adjustment longitudinally of said drum v 21. In a machine of the class described, the combination of a supply tank, a removable tray-shaped strainer located in said tank, a rotary adhesive-distributing drum mounted across said tank and depending in said strainer, and means for rotating the drum.

22. In a machine of the class described,

the combination of a tank, a rotary adhesivedistributing drum mounted on said tank and means for supplying adhesive substance to the periphery of said drum, means for rotating said drum, a scraper for acting on the periphery of the drum, the above mentioned parts being carried by said tank, a removable frame mounted above the said tank and provided with feed-rollers for feeding the web to said drum and-also provided with a stripper for engagin the web and lifting it from said drum, sai latter mentioned parts being removable with said frame.

23. In a machine of the class described,

the combination of a tank, a rotary adhesive-distributing drum mounted on said tank and means for supplying its periphery with adhesive substance, means for rotating said drum, a scraper acting on the periphery of said drum, the above mentioned parts being carried by said tank, a removable frame mounted above said adhesive supplying means and provided with feed-rollers for feeding the web to the drum and a guide for the back of the Web arranged in proximity to said drum, said latter mentioned parts being carriedlby and removable with.

said frame.

24. In a machine of the class described, the

combination of a tank a rotary adhesive distributing drum mounted on said tank and means for supplying adhesive substance to the periphery of the drum, means for rotating the drum, the above mentioned parts being mounted on said tank, feed-rollers for "feeding the web to said drum, aremovable frame mounted on said tank and provided with a scraper for engaging the periphery of said drum, and a table removably mounted on said frame adjacent said feed-rollers and over which the web passes, said latter mentioned parts being carried by and removable with said frame.

25. In a machine of the class described, the combination of arotary adhesive-distributing drum'and means for supplying adhesive substance tothe periphery of said drum, a set of feed-rollers arranged adjacent said drum for feeding a web onto said drum, and disposed upon one side of the vertical plane containing the axis of r0- tation of said drum, a stripper engaging the periphery of said drum for lifting the web therefrom, and guiding-means for engaging the back of the web as it is lifted from the drum, said stripper and guiding-means being located to the other side of the vertical plane containing the axis of rotation of said drum.

26. In a machine of the class described, the combination of arotary adhesive-distributing drum and means for applying adhesive substance to the periphery of the drum, and a scraper cooperating with the periphery of said drum and arranged longitudinally thereof and inclined downwardly, said scraper being angularly adjustable on an axis parallel with that of the drum and also adjustable transversely of said axis of the scraper.

27. In a machine of the class described, the combination of a rotary adhesive-distributing drum and means for supplying adhesive substance to the periphery of said drum, and a scraper cooperating with the periphery of saiddrum and 'arranged longitudinally thereof and being angularly adjustable on an axis parallel with that of the drum, said scraper being concave upon its under side.

'In testimony whereof, I have hereunto set my hand in the presence of the two sub-- scribing witnesses.

AUGUST M. BECKER.

Witnesses JOHN O. SEIIERT, 'WILLIs FOWLER. 

